Surely, Karateka's approach is the holistic one - he uses the PN core. But for those looking for speed and/or a more subtle way to submit their pages to search engines the above example may help.
With the above example it is possible to let the PN-installation untouched and build bridge-pages for the search engines only (e.g. submitting the sitemap.htm from the above example to the searchengine instead of the index.php). And of course you can build different pages for different search engines :-)